Desk lamp



FIG. 1 is a top, front, left side perspective view of a desk lamp showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a bottom, rear, right side perspective view of the desk lamp.

The broken lines in the drawings illustrate portions of the desk lamp that form no part of the claimed design. 

CLAIM The ornamental design for a desk lamp, as shown and described. 